linux-kernel - Re: [PATCH v2 1/1] serial: 8250_of: Drop quirk fot NPCM from 8250

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Message-ID: <Zc4_IHMQWSGtCCC2@smile.fi.intel.com>
Date: Thu, 15 Feb 2024 18:43:12 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-serial <linux-serial@...r.kernel.org>,
	Jiri Slaby <jirislaby@...nel.org>
Subject: Re: [PATCH v2 1/1] serial: 8250_of: Drop quirk fot NPCM from
 8250_port

On Thu, Feb 15, 2024 at 06:40:15PM +0200, Ilpo Järvinen wrote:
> On Thu, 15 Feb 2024, Andy Shevchenko wrote:

..

> > +	/*
> > +	 * Nuvoton calls the scratch register 'UART_TOR' (timeout
> > +	 * register). Enable it, and set TIOC (timeout interrupt
> > +	 * comparator) to be 0x20 for correct operation.
> > +	 */
> > +	serial_port_out(port, UART_NPCM_TOR, UART_NPCM_TOIE | 0x20);
> > +
> > +	return serial8250_do_startup(port);
> 
> I know this matches how it is currently done\

Exactly, I haven't changed the workflow.
Does it mean you are okay with the change?

> but I wonder if TOIE should not be enabled until ->setup_irq()
> has been called.

No idea, this will need an extensive test on the hardware and should
be done separately anyway. I have no HW to test this.

-- 
With Best Regards,
Andy Shevchenko